Warp stop-motion for looms.



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[Application filed Jan. 24, 1961.) (No Model.)

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UNTTED STATES PATENT OFFICE.

VALIIACE I. STIMPSON, OF MILFORD, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF PORTLAND, MAINE, AND HOPEDALE, MASSACHUSETTS WARP STOP-MOTION FOR LOONIS.

SECIFICATION forming part of Letters Patent No. 675,682, dated June 4, 1901. Application led January 24', 1901. Serial No. 44,562. (No model.)

To JZ wtmnJ it mfr/y concern:

Be it known that I, WALLACE I. STIMrsoN, a citizen of the United States, residing at Milford, in the county of Vorcester and State of Massachusetts, have invented an Improvement in W'arp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings repre- Io senting like parts.

This invention has for its object the production of a novel warp-stop-motion apparatus particularly adapted for use in connection with looms for weaving, one ot the prin- I5 cipal objects of the invention being to provide a novel form of feeler mechanism to coperate with a released detector.

Other novel features will be hereinafter described, and particularly pointed out in the zo claims.

Figure l is a cross-sectional view of aloom to be understood with one embodiment of my invention applied thereto. Fig. 2 is an enlarged front elevation of a portion of the stop- 25 motion mechanism shown in Fig. l. Fig. 3 is a sectional detail thereof on the line a; x, Fig. 2; and Fig. i is an enlarged view, in side elevation, of the feeler and back-stop and showing in section a released detector.

3o Referring to Fig. l, the harnesses H for the formation of the shed, whip-roll NV, breastbeam B, and shipper-handle S may be and are all of usual or well-known construction, the shipper-handle being the only element of the stopping means herein illustrated.

Each loom side A has erected upon it an upright stand AX, to the upper end of which is secured a bracket c, having a depending portion ed, the depending portions serving to support such warp-stop-motion mechanism as inzimediately7 cooperates with the warpthreads.

A warp-rest tu, shown as a bar, is rigidly secured to the two depending portions of the two brackets in any suitable manner and extends across the loom below the warp-threads, as clearly shown in Figs. 1,2, and 3, while toward the front portion of the brackets a vertically-movable warp-rest wx is shown as mounted in upright slot a2 in the depending bracket portions a', the projecting ends of the warp-rest wx being attached to suitable springs SX, the upper ends of the springs being fixedly held, as by pins 3, on the brackets.

I have herein shown two series of controlling-detectors d, arranged in parallelism and between the warp-rests referred to, each detector being shown as having two longitudinal slots therein, d d2, respectively, the warp; threads being passed through the lower slots 6o of thedetectors and normally maintaining the latter in the position shown in the drawings.

By using a plurality of banks or series of detectors, as herein shown, each series coperating with the warps which are to form one of the planes of the shed, I am enabled to dispense with independent leasing devices.

The warps in the lower plane of the shed are supported by the warp-rests w wx, the 7o latter yielding when the lower warps are subjected to increased tension as the shed is opened.

The feeler mechanism is in my present invention located above the Warp-threads, so that it is readily accessible and its operation can be observed at all times by the attendant, and as the feeler mechanism is the same for each bank of detectors I will describe one of such mechanisms in detail.

Two thin flat plates l) are set on edge and slightly separated from each other and eX- tend from one to the other side of the loom in parallelism, being supported in the bracket portions a in any suitable manner-as,for in- 85 stance,by pin G-the upper edges of the plates being toothed, as at bx, the teeth being undercut, as best shown in Fig. 4, and these stop-plates, or back-stops, as they maybe termed, extend through the upper slots d' of 9o the detectors, the upper ends or heads (ZX of the latter being normally maintained by the warp-threads considerably above the upper toothed edges hX of the plates b. A feeler is mounted between the plates h, the said feeler being shown as a thin flat plate f, having its upper edge toothed, as at fx, the teeth being undercut, (see Fig. 4,) but in the opposite direction to the back-stop teeth hX, both sets of teeth, however, having the same vertical Ioo height. One end of the feeler is extended through a slot in the bracket extension a' and is pivotally connected with one arm of a bell-crank lever L, pivoted on the bracket. at 8, (see Fig. 2,) said bell-crank lever by means of a depending link or arm L being rocked by any suitable mechanism (not herein illustrated) to normally rock the feeler f in the direction of the arrow 10, Fig. 4t, the opposite stroke of the feeler, which may be termed its feeling stroke, being effected by gravity in the present instance. The feeler is longitudinally slotted, as at l2, Fig. 2, to receive the pin 6.

So long as the detectors are maintained in normal position by the warp-threads the longitudinal vibratory or reciprocatory movement of the feeler will not be interrupted; but when a detector is released by breakage or failure of its warp-thread it descends until its head ctx rests between two of the teeth of the two sets ofback-stop teeth b ,and upon the next feeling movement ot' the feeler opposite to the arrow 10, Fig. 5, the feeler-teeth f will engage the detector and press it against the teeth bxfthe continued movementof the feeler being thereby arrested. By referring to Fig. L it will be seen that only the points ot' both the back-stop and feeler-teet-h engage the detector, and they engage the latter at points in the same substantially horizontally plane intersecting the detector and on opposite faces of the detector, the latter being shown as thin and .fiat and preferably made of sheet metal.

When the feeler is arrested, as has been described, the stopping means is operated by suitable intervening connections, not herein shown, which may be of well-known construction, the shipper-lever S being released from its holding-notch to effect the stoppage automatically of the loom.

In the structure herein shown, wherein a plurality of banks of detectors are illustrated, the several feelers are connected to a suitable bell-crank lever L in any suitable manner, as by a cross-pin 30. (See dotted lines, Fig. 2.)

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a warp stop-motion, controlling-detectors normally maintained inoperative by the warp-threads, stopping means actuated by or through a released detector, and means to coperate with the latter, including a member having. two parallel series of upturned, undercut teeth, a member having a single series of oppositely-inclined, undercut teeth located between the two series, and devices to normally etfect relative longitudinal reciprocatory movement of said members, a released detector being engaged by the points of the directly-opposed iixed and movable teeth to arrest the relative movement of said toothed members.

2. In a warp stop-motion, controlling-detectors normally maintained inoperative by the Warp-threads, a stop comprising a double row of undercut teeth,a normally vibrating feeler having itsupper edge provided with a series of undercut teeth oppositely inclined tothe stop-teeth and located between the two rows of the latter, a released detector being oppositely engaged by the points of the stop and feeler teeth respectively whereby arrest of the feeler is effected, and stopping means operative by or through such arrest of the feeler.

3. In a warp stop-motion, a series of thin and iat, longitudinally-slotted controllingdetectors normally maintained inoperative by the warp-threads, two parallel stop-plates eX- tended through the slots of the detectors and having their upper edges provided with undercut teeth, an interposed longitudinally-reciprocating feelerhaving its upper edge provided with oppositely-inclined undercut teeth, a released detector being engaged by the points of the stop and feeler teeth opposite each other to arrest the feeler, and stopping means controlled by or through arrest of the feeler.

4. In a loom, a series of warp-stopmotion controlling detectors normally maintained inoperative by the warp-threads, a fixed warprest back of the detectors, a yieldingly-supported warp-rest in front of the detectors and adapted to support the warps in the lower plane of the shed, and a normally vibrating feeler to 'cooperate with a released detector.

5. In a warp stop-motion, a series of thin and iiat controlling-detectors having each two elongated slots therein, said detectors being normally maintained inoperative by warpthreads extended through the lower slots, a normally longitudinally reciprocating feeler extended through the upper slots of the detectors and having a series of undercut teeth ou its upper edge, and a double series of backstop teeth also undercut and oppositely inclined to the feeler-teeth, a released detector being oppositely engaged by the points of the feeler and back-stop teeth to arrest the feeler.

6. In a loom, shed-forming mechanism and a whip-roll, a fixed warp-rest and a verticallymovable, yieldingly supported warp s rest, both located between the said mechanism and the whip-roll, two series of warp-stop-motioncontrolling detectors arranged between the warp-rests, and normally maintained inoperative by the warp-threads, the detectors also serving to lease the threads, a feeler for each series of detectors normally vibratable above the warp-threads and adapted to coperate with a released detector of its series, and a back-stop to hold such detector against the pressure of the feeler, the warp-rests supporting the threads in the lower planeof the shed.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

VALLACE I. STIMPSON.

Witnesses:

GEORGE Oris DRAPER, ERNEST W. WOOD.

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